Brendan,
There have been religious courts in Britain for centuries and no one seems to be bothered much.
// But not to all non-Muslims. It has often been remarked on how similar Muslims and Jews are in many of their traditions, such as food laws, burial rites and language, and this case could prove no exception. Jewish courts are in daily use in Britain, and have been for centuries.
We can't drag people in off the streets
David Frei
Registrar, The London Beth Din
British Jews, particularly the orthodox, will frequently turn to their own religious courts, the Beth Din, to resolve civil disputes, covering issues as diverse as business and divorce.
"There's no compulsion", the registrar of the London Beth Din, David Frei, said. "We can't drag people in off the streets."
Both sides in a dispute must be Jewish, obviously, and must have agreed to have their case heard by the Beth Din. Once that has happened, its eventual decision is binding. English law states that any third party can be agreed by two sides to arbitrate in a dispute, and in this case the institutional third party is the Beth Din.
The Beth Din also takes care of a multitude of Jewish community affairs, many of which never give rise to any dispute: the dates of the Sabbath, kosher certification of caterers and bakers, medical ethics for Jewish patients and religious conversions. But it is in the areas of divorce and litigation that the Beth Din acts as a court in the western sense. //
http://news.bbc.co.uk/1/hi/7233040.stm